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ADS122U04EVM: Too mach noise ADS122U04

Part Number: ADS122U04EVM
Other Parts Discussed in Thread: ADS122U04


I bought ADS122U04 Evalution Mode. Installed Delta-Sigma ADC EvaluaTIon Software on my PC.

Set the register values as shown in the attached pictures.

AINP and AINN shorted to (AVDD + AVSS) / 2; Gain 8; 600SPS; Normal mode; Internal 2.048 reference

I get the noise value (uVpp) = 699*0.122 = 85.278 uV

But in the Datasheet this value is 22.30 uV

Why is this happening?